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Int. J. Mol. Sci. 2018, 19(11), 3508; https://doi.org/10.3390/ijms19113508

Non-Structural Proteins from Human T-cell Leukemia Virus Type 1 in Cellular Membranes—Mechanisms for Viral Survivability and Proliferation

Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
Received: 8 October 2018 / Revised: 1 November 2018 / Accepted: 6 November 2018 / Published: 8 November 2018
(This article belongs to the Section Biochemistry)
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Abstract

Human T-cell leukemia virus type 1 (HTLV-1) is the causative agent of illnesses, such as adult T-cell leukemia/lymphoma, myelopathy/tropical spastic paraparesis (a neurodegenerative disorder), and other diseases. Therefore, HTLV-1 infection is a serious public health concern. Currently, diseases caused by HTLV-1 cannot be prevented or cured. Hence, there is a pressing need to comprehensively understand the mechanisms of HTLV-1 infection and intervention in host cell physiology. HTLV-1-encoded non-structural proteins that reside and function in the cellular membranes are of particular interest, because they alter cellular components, signaling pathways, and transcriptional mechanisms. Summarized herein is the current knowledge about the functions of the membrane-associated p8I, p12I, and p13II regulatory non-structural proteins. p12I resides in endomembranes and interacts with host proteins on the pathways of signal transduction, thus preventing immune responses to the virus. p8I is a proteolytic product of p12I residing in the plasma membrane, where it contributes to T-cell deactivation and participates in cellular conduits, enhancing virus transmission. p13II associates with the inner mitochondrial membrane, where it is proposed to function as a potassium channel. Potassium influx through p13II in the matrix causes membrane depolarization and triggers processes that lead to either T-cell activation or cell death through apoptosis. View Full-Text
Keywords: T-cell leukemia virus type 1; p8I protein; p12I protein; p13II protein; virus-host interactions; viral non-structural proteins; cellular membranes T-cell leukemia virus type 1; p8I protein; p12I protein; p13II protein; virus-host interactions; viral non-structural proteins; cellular membranes
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Georgieva, E.R. Non-Structural Proteins from Human T-cell Leukemia Virus Type 1 in Cellular Membranes—Mechanisms for Viral Survivability and Proliferation. Int. J. Mol. Sci. 2018, 19, 3508.

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